/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Sergey Prigogin (Google)
 *******************************************************************************/
package org.eclipse.cdt.internal.ui.preferences.formatter;

import java.util.Map;

import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;

import org.eclipse.cdt.core.formatter.DefaultCodeFormatterConstants;

/**
 * Tab page for the comment formatter settings.
 */
public class CommentsTabPage extends FormatterTabPage {

//	private static abstract class Controller implements Observer {
//		private final Collection<CheckboxPreference> fMasters;
//		private final Collection<Object> fSlaves;
//
//		public Controller(Collection<CheckboxPreference> masters, Collection<Object> slaves) {
//			fMasters= masters;
//			fSlaves= slaves;
//			for (CheckboxPreference pref : fMasters) {
//				pref.addObserver(this);
//			}
//		}
//
//		public void update(Observable o, Object arg) {
//			boolean enabled= areSlavesEnabled();
//
//			for (Object slave : fSlaves) {
//				if (slave instanceof Preference) {
//					((Preference) slave).setEnabled(enabled);
//				} else if (slave instanceof Control) {
//					((Group) slave).setEnabled(enabled);
//				}
//			}
//		}
//
//		public Collection<CheckboxPreference> getMasters() {
//			return fMasters;
//		}
//
//		protected abstract boolean areSlavesEnabled();
//	}
//
//	private final static class OrController extends Controller {
//		public OrController(Collection<CheckboxPreference> masters, Collection<Object> slaves) {
//			super(masters, slaves);
//			update(null, null);
//		}
//
//		@Override
//		protected boolean areSlavesEnabled() {
//			for (CheckboxPreference pref : getMasters()) {
//				if (pref.getChecked())
//					return true;
//			}
//			return false;
//		}
//	}

	private final String PREVIEW=
		createPreviewHeader(FormatterMessages.CommentsTabPage_preview_header) + 
		"int gVariable = 100;    \t\t// line 1 of comment\n" + //$NON-NLS-1$
		// needs as many tabs as indent size, consider case when tab indent size is 1
		"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t// line 2 of comment\n" + //$NON-NLS-1$
		"\n" + //$NON-NLS-1$
		"void lineComments() {\n" +  //$NON-NLS-1$
		"\tprintf(\"%d\\n\", 1234);   \t\t// Integer number\n" +  //$NON-NLS-1$
		"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t// More here\n" +  //$NON-NLS-1$
		"\tprintf(\"%.5g\\n\", 12.34);\t\t// Floating point number\n" +  //$NON-NLS-1$
		"}\n"; //$NON-NLS-1$

	private TranslationUnitPreview fPreview;

	public CommentsTabPage(ModifyDialog modifyDialog, Map<String, String> workingValues) {
		super(modifyDialog, workingValues);
	}

	@Override
	protected void doCreatePreferences(Composite composite, int numColumns) {
//		final int indent= fPixelConverter.convertWidthInCharsToPixels(4);

		// Global group
//		final Group globalGroup= createGroup(numColumns, composite, FormatterMessages.CommentsTabPage_group1_title);
//		createPrefFalseTrue(globalGroup, numColumns, FormatterMessages.CommentsTabPage_do_not_join_lines, DefaultCodeFormatterConstants.FORMATTER_JOIN_LINES_IN_COMMENTS, true);

		// Line comment group
		final Group lineCommentGroup= createGroup(numColumns, composite, FormatterMessages.CommentsTabPage_group1_title);
//		final CheckboxPreference singleLineCommentsOnFirstColumn= createPrefFalseTrue(lineCommentGroup, numColumns, FormatterMessages.CommentsTabPage_format_line_comments_on_first_column, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_LINE_COMMENT_STARTING_ON_FIRST_COLUMN, false);
//		((GridData) singleLineCommentsOnFirstColumn.getControl().getLayoutData()).horizontalIndent= indent;
		createPrefFalseTrue(lineCommentGroup, numColumns, FormatterMessages.CommentsTabPage_preserve_white_space_before_line_comment, DefaultCodeFormatterConstants.FORMATTER_COMMENT_PRESERVE_WHITE_SPACE_BETWEEN_CODE_AND_LINE_COMMENT, false);
		createPrefFalseTrue(lineCommentGroup, numColumns, FormatterMessages.CommentsTabPage_line_up_line_comment_in_blocks_on_first_column, DefaultCodeFormatterConstants.FORMATTER_COMMENT_LINE_UP_LINE_COMMENT_IN_BLOCKS_ON_FIRST_COLUMN, false);
		createNumberPref(lineCommentGroup, numColumns, FormatterMessages.CommentsTabPage_line_width, DefaultCodeFormatterConstants.FORMATTER_COMMENT_MIN_DISTANCE_BETWEEN_CODE_AND_LINE_COMMENT, 0, 9999);
//		final CheckboxPreference singleLineComments= createPrefFalseTrue(lineCommentGroup, numColumns, FormatterMessages.CommentsTabPage_enable_line_comment_formatting, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_LINE_COMMENT, false);
//		createPrefFalseTrue(lineCommentGroup, numColumns, FormatterMessages.CommentsTabPage_never_indent_line_comments_on_first_column, DefaultCodeFormatterConstants.FORMATTER_NEVER_INDENT_LINE_COMMENTS_ON_FIRST_COLUMN, false);

		// Block comment settings
//		final Group blockSettingsGroup= createGroup(numColumns, composite, FormatterMessages.CommentsTabPage_group4_title);
//		final CheckboxPreference header= createPrefFalseTrue(blockSettingsGroup, numColumns, FormatterMessages.CommentsTabPage_format_header, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_HEADER, false);
//		GridData spacerData= new GridData(0, 0);
//		spacerData.horizontalSpan= numColumns;
//		final CheckboxPreference blockComment= createPrefFalseTrue(blockSettingsGroup, numColumns, FormatterMessages.CommentsTabPage_enable_block_comment_formatting, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_BLOCK_COMMENT, false);
//		final CheckboxPreference nlBoundariesBlock= createPrefFalseTrue(blockSettingsGroup, numColumns, FormatterMessages.CommentsTabPage_new_lines_at_comment_boundaries, DefaultCodeFormatterConstants.FORMATTER_COMMENT_NEW_LINES_AT_BLOCK_BOUNDARIES, false);
//		final CheckboxPreference blankLinesBlock= createPrefFalseTrue(blockSettingsGroup, numColumns, FormatterMessages.CommentsTabPage_remove_blank_block_comment_lines, DefaultCodeFormatterConstants.FORMATTER_COMMENT_CLEAR_BLANK_LINES_IN_BLOCK_COMMENT, false);

		// Doxygen comment formatting settings
//		final Group settingsGroup= createGroup(numColumns, composite, FormatterMessages.CommentsTabPage_group2_title);
//		final CheckboxPreference doxygen= createPrefFalseTrue(globalGroup, numColumns, FormatterMessages.commentsTabPage_enable_javadoc_comment_formatting, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_JAVADOC_COMMENT, false);
//		final CheckboxPreference html= createPrefFalseTrue(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_format_html, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_HTML, false);
//		final CheckboxPreference code= createPrefFalseTrue(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_format_code_snippets, DefaultCodeFormatterConstants.FORMATTER_COMMENT_FORMAT_SOURCE, false);
//		final CheckboxPreference blankDoxygen= createPrefInsert(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_blank_line_before_doxygen_tags, DefaultCodeFormatterConstants.FORMATTER_COMMENT_INSERT_EMPTY_LINE_BEFORE_ROOT_TAGS);
//		final CheckboxPreference indentDoxygen= createPrefFalseTrue(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_indent_doxygen_tags, DefaultCodeFormatterConstants.FORMATTER_COMMENT_INDENT_ROOT_TAGS, false);
//		final CheckboxPreference indentDesc= createPrefFalseTrue(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_indent_description_after_param, DefaultCodeFormatterConstants.FORMATTER_COMMENT_INDENT_PARAMETER_DESCRIPTION, false);
//		((GridData) indentDesc.getControl().getLayoutData()).horizontalIndent= indent;
//		final CheckboxPreference nlParam= createPrefInsert(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_new_line_after_param_tags, DefaultCodeFormatterConstants.FORMATTER_COMMENT_INSERT_NEW_LINE_FOR_PARAMETER);
//		final CheckboxPreference nlBoundariesDoxygen= createPrefFalseTrue(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_new_lines_at_doxygen_boundaries, DefaultCodeFormatterConstants.FORMATTER_COMMENT_NEW_LINES_AT_JAVADOC_BOUNDARIES, false);
//		final CheckboxPreference blankLinesDoxygen= createPrefFalseTrue(settingsGroup, numColumns, FormatterMessages.CommentsTabPage_clear_blank_lines, DefaultCodeFormatterConstants.FORMATTER_COMMENT_CLEAR_BLANK_LINES_IN_JAVADOC_COMMENT, false);

		// Line width settings
//		final Group widthGroup= createGroup(numColumns, composite, FormatterMessages.CommentsTabPage_group3_title);
//		final NumberPreference lineWidth= createNumberPref(widthGroup, numColumns, FormatterMessages.CommentsTabPage_line_width, DefaultCodeFormatterConstants.FORMATTER_COMMENT_LINE_LENGTH, 0, 9999);

//		ArrayList<CheckboxPreference> lineFirstColumnMasters= new ArrayList<CheckboxPreference>();
//		lineFirstColumnMasters.add(singleLineComments);
//
//		ArrayList<Object> lineFirstColumnSlaves= new ArrayList<Object>();
//		lineFirstColumnSlaves.add(singleLineCommentsOnFirstColumn);
//
//		new Controller(lineFirstColumnMasters, lineFirstColumnSlaves) {
//			@Override
//			protected boolean areSlavesEnabled() {
//				return singleLineComments.getChecked();
//            }
//		}.update(null, null);
//
//		ArrayList<CheckboxPreference> doxygenMaster= new ArrayList<CheckboxPreference>();
//		doxygenMaster.add(doxygen);
//		doxygenMaster.add(header);
//
//		ArrayList<Object> doxygenSlaves= new ArrayList<Object>();
//		doxygenSlaves.add(settingsGroup);
//		doxygenSlaves.add(html);
//		doxygenSlaves.add(code);
//		doxygenSlaves.add(blankDoxygen);
//		doxygenSlaves.add(indentDoxygen);
//		doxygenSlaves.add(nlParam);
//		doxygenSlaves.add(nlBoundariesDoxygen);
//		doxygenSlaves.add(blankLinesDoxygen);
//
//		new OrController(doxygenMaster, doxygenSlaves);
//
//		ArrayList<CheckboxPreference> indentMasters= new ArrayList<CheckboxPreference>();
//		indentMasters.add(doxygen);
//		indentMasters.add(header);
//		indentMasters.add(indentDoxygen);
//
//		ArrayList<Object> indentSlaves= new ArrayList<Object>();
//		indentSlaves.add(indentDesc);
//
//		new Controller(indentMasters, indentSlaves) {
//			@Override
//			protected boolean areSlavesEnabled() {
//				return (doxygen.getChecked() || header.getChecked()) && indentDoxygen.getChecked();
//            }
//		}.update(null, null);
//
//		ArrayList<CheckboxPreference> blockMasters= new ArrayList<CheckboxPreference>();
//		blockMasters.add(blockComment);
//		blockMasters.add(header);
//
//		ArrayList<Object> blockSlaves= new ArrayList<Object>();
//		blockSlaves.add(blockSettingsGroup);
//		blockSlaves.add(nlBoundariesBlock);
//		blockSlaves.add(blankLinesBlock);
//
//		new OrController(blockMasters, blockSlaves);
//
//		ArrayList<CheckboxPreference> lineWidthMasters= new ArrayList<CheckboxPreference>();
//		lineWidthMasters.add(doxygen);
//		lineWidthMasters.add(blockComment);
//		lineWidthMasters.add(singleLineComments);
//		lineWidthMasters.add(header);
//
//		ArrayList<Object> lineWidthSlaves= new ArrayList<Object>();
//		lineWidthSlaves.add(widthGroup);
//		lineWidthSlaves.add(lineWidth);
//
//		new OrController(lineWidthMasters, lineWidthSlaves);
	}

	@Override
	protected void initializePage() {
		fPreview.setPreviewText(PREVIEW);
	}

    /* (non-Javadoc)
     * @see org.eclipse.jdt.internal.ui.preferences.formatter.ModifyDialogTabPage#doCreateCPreview(org.eclipse.swt.widgets.Composite)
     */
    @Override
	protected CPreview doCreateCPreview(Composite parent) {
        fPreview= new TranslationUnitPreview(fWorkingValues, parent);
        return fPreview;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jdt.internal.ui.preferences.formatter.ModifyDialogTabPage#doUpdatePreview()
     */
    @Override
	protected void doUpdatePreview() {
    	super.doUpdatePreview();
        fPreview.update();
    }

	private CheckboxPreference createPrefFalseTrue(Composite composite, int numColumns, String text, String key, boolean invertPreference) {
		if (invertPreference)
			return createCheckboxPref(composite, numColumns, text, key, TRUE_FALSE);
		return createCheckboxPref(composite, numColumns, text, key, FALSE_TRUE);
	}

//    private CheckboxPreference createPrefInsert(Composite composite, int numColumns, String text, String key) {
//        return createCheckboxPref(composite, numColumns, text, key, DO_NOT_INSERT_INSERT);
//    }
}
